8 What are the common greenhouse types?A greenhouse is a structure enclosed by glass or plastic that allows light transmission for the growth of plants. There are four basic styles of greenhouse design.The lean-to greenhouse shares a wall with a building and relies on the building structure to provide support for the roof.

10 Even-span greenhouse structures are single houses that have roofs with an even pitch and an even width. A common even-span greenhouse that uses arching pipes for the framework is called a hoop house.

12 Uneven-span greenhouses have unequal pitches and widthsUneven-span greenhouses have unequal pitches and widths. Use of this style is limited to hillsides.Ridge-and-furrow greenhouse structures consist of a number of greenhouses connected along the length of the house.

14 Create a GreenhouseUse the marshmallows and toothpicks to create a greenhouse of one of the styles we have just discussed.

15 What considerations need to be addressed for greenhouse frameworks?The greenhouse framework supports the greenhouse covering material.The framework should be strong, yet allow the maximum amount of light to reach the plants.

17 What materials are used for greenhouse glazing?The covering of the greenhouse is referred to as the glazing.Considerations include:DurabilityLight transmissionCostHeating costsStart Here

18 Flexible sheets of polyethylene are stretched over the greenhouse framework.Structured sheets, including polycarbonate, acrylic, and fiberglass, which are made with double walls offer good insulation.

32 Rolling benches maximize growing space by limiting space for aislesRolling benches maximize growing space by limiting space for aisles. The benches are placed on pipes, which allows them to be easily moved from side to side.